1023304505021 has 4 divisors (see below), whose sum is σ = 1023313345632. Its totient is φ = 1023295664412.

The previous prime is 1023304505011. The next prime is 1023304505023. The reversal of 1023304505021 is 1205054033201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1023304505021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023304505023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4244345 + ... + 4478958.

It is an arithmetic number, because the mean of its divisors is an integer number (255828336408).

Almost surely, 2^{1023304505021} is an apocalyptic number.

It is an amenable number.

1023304505021 is a deficient number, since it is larger than the sum of its proper divisors (8840611).

1023304505021 is an equidigital number, since it uses as much as digits as its factorization.

1023304505021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8840610.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 1023304505021 its reverse (1205054033201), we get a palindrome (2228358538222).

The spelling of 1023304505021 in words is "one trillion, twenty-three billion, three hundred four million, five hundred five thousand, twenty-one".